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Miller" , Jakub Kicinski , Stanimir Varbanov Cc: linux-arm-msm@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [RFC PATCH 00/15] create power sequencing subsystem Date: Tue, 17 Aug 2021 03:54:52 +0300 Message-Id: <20210817005507.1507580-1-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org This is an RFC of the proposed power sequencer subsystem. This is a generification of the MMC pwrseq code. The subsystem tries to abstract the idea of complex power-up/power-down/reset of the devices. The primary set of devices that promted me to create this patchset is the Qualcomm BT+WiFi family of chips. They reside on serial+platform interfaces (older generations) or on serial+PCIe (newer generations). They require a set of external voltage regulators to be powered on and (some of them) have separate WiFi and Bluetooth enable GPIOs. This patchset being an RFC tries to demonstrate the approach, design and usage of the pwrseq subsystem. Following issues are present in the RFC at this moment but will be fixed later if the overall approach would be viewed as acceptable: - No documentation While the code tries to be self-documenting proper documentation would be required. - Minimal device tree bindings changes There are no proper updates for the DT bindings (thus neither Rob Herring nor devicetree are included in the To/Cc lists). The dt schema changes would be a part of v1. - Lack of proper PCIe integration At this moment support for PCIe is hacked up to be able to test the PCIe part of qca6390. Proper PCIe support would require automatically powering up the devices before the scan basing on the proper device structure in the device tree. ---------------------------------------------------------------- Dmitry Baryshkov (15): power: add power sequencer subsystem pwrseq: port MMC's pwrseq drivers to new pwrseq subsystem mmc: core: switch to new pwrseq subsystem ath10k: add support for pwrseq sequencing Bluetooth: hci_qca: merge qca_power into qca_serdev Bluetooth: hci_qca: merge init paths Bluetooth: hci_qca: merge qca_power_on with qca_regulators_init Bluetooth: hci_qca: futher rework of power on/off handling Bluetooth: hci_qca: add support for pwrseq pwrseq: add support for QCA BT+WiFi power sequencer arm64: dts: qcom: sdm845-db845c: switch bt+wifi to qca power sequencer arm64: dts: qcom: qrb5165-rb5: add bluetooth support arm64: dts: qcom: sdm845-db845c: add second channel support to qca power sequencer WIP: PCI: qcom: use pwrseq to power up bus devices WIP: arm64: dts: qcom: qrb5165-rb5: add bus-pwrseq property to pcie0 .../{mmc => power/pwrseq}/mmc-pwrseq-emmc.yaml | 0 .../{mmc => power/pwrseq}/mmc-pwrseq-sd8787.yaml | 0 .../{mmc => power/pwrseq}/mmc-pwrseq-simple.yaml | 0 arch/arm64/boot/dts/qcom/qrb5165-rb5.dts | 51 +++ arch/arm64/boot/dts/qcom/sdm845-db845c.dts | 28 +- arch/arm64/boot/dts/qcom/sdm845.dtsi | 6 + drivers/bluetooth/hci_qca.c | 286 +++++++------- drivers/mmc/core/Kconfig | 32 -- drivers/mmc/core/Makefile | 4 - drivers/mmc/core/core.c | 9 +- drivers/mmc/core/host.c | 8 +- drivers/mmc/core/mmc.c | 3 +- drivers/mmc/core/pwrseq.c | 117 ------ drivers/mmc/core/pwrseq.h | 58 --- drivers/mmc/core/pwrseq_emmc.c | 120 ------ drivers/mmc/core/pwrseq_sd8787.c | 107 ------ drivers/mmc/core/pwrseq_simple.c | 164 -------- drivers/net/wireless/ath/ath10k/snoc.c | 63 +++- drivers/net/wireless/ath/ath10k/snoc.h | 2 + drivers/pci/controller/dwc/pcie-qcom.c | 13 + drivers/power/Kconfig | 1 + drivers/power/Makefile | 1 + drivers/power/pwrseq/Kconfig | 57 +++ drivers/power/pwrseq/Makefile | 11 + drivers/power/pwrseq/core.c | 411 +++++++++++++++++++++ drivers/power/pwrseq/pwrseq_emmc.c | 118 ++++++ drivers/power/pwrseq/pwrseq_qca.c | 291 +++++++++++++++ drivers/power/pwrseq/pwrseq_sd8787.c | 97 +++++ drivers/power/pwrseq/pwrseq_simple.c | 160 ++++++++ include/linux/mmc/host.h | 4 +- include/linux/pwrseq/consumer.h | 88 +++++ include/linux/pwrseq/driver.h | 71 ++++ 32 files changed, 1592 insertions(+), 789 deletions(-) rename Documentation/devicetree/bindings/{mmc => power/pwrseq}/mmc-pwrseq-emmc.yaml (100%) rename Documentation/devicetree/bindings/{mmc => power/pwrseq}/mmc-pwrseq-sd8787.yaml (100%) rename Documentation/devicetree/bindings/{mmc => power/pwrseq}/mmc-pwrseq-simple.yaml (100%) delete mode 100644 drivers/mmc/core/pwrseq.c delete mode 100644 drivers/mmc/core/pwrseq.h delete mode 100644 drivers/mmc/core/pwrseq_emmc.c delete mode 100644 drivers/mmc/core/pwrseq_sd8787.c delete mode 100644 drivers/mmc/core/pwrseq_simple.c create mode 100644 drivers/power/pwrseq/Kconfig create mode 100644 drivers/power/pwrseq/Makefile create mode 100644 drivers/power/pwrseq/core.c create mode 100644 drivers/power/pwrseq/pwrseq_emmc.c create mode 100644 drivers/power/pwrseq/pwrseq_qca.c create mode 100644 drivers/power/pwrseq/pwrseq_sd8787.c create mode 100644 drivers/power/pwrseq/pwrseq_simple.c create mode 100644 include/linux/pwrseq/consumer.h create mode 100644 include/linux/pwrseq/driver.h